diff --git a/app/Http/Submission/Handlers/TestingHandler.php b/app/Http/Submission/Handlers/TestingHandler.php
index e6a048ac55..403326c7cb 100644
--- a/app/Http/Submission/Handlers/TestingHandler.php
+++ b/app/Http/Submission/Handlers/TestingHandler.php
@@ -287,7 +287,7 @@ public function text($parser, $data): void
                     $this->TestCreator->testCommand .= $data;
                     break;
                 case 'STARTTESTTIME':
-                    $this->TestCreator->testStartTime = Carbon::createFromTimestampMsUTC($data);
+                    $this->TestCreator->testStartTime = Carbon::createFromTimestampUTC($data);
                     break;
             }
         } elseif ($parent === 'NAMEDMEASUREMENT' && $element === 'VALUE') {
diff --git a/tests/Feature/Submission/Tests/TestXMLTest.php b/tests/Feature/Submission/Tests/TestXMLTest.php
index e4dc99a309..c637c18453 100644
--- a/tests/Feature/Submission/Tests/TestXMLTest.php
+++ b/tests/Feature/Submission/Tests/TestXMLTest.php
@@ -149,7 +149,7 @@ public function testStartTestTime(): void
                             [
                                 'node' => [
                                     'name' => 'exec',
-                                    'startTime' => '2026-02-13T18:03:54+00:00',
+                                    'startTime' => '2026-02-16T13:56:30+00:00',
                                 ],
                             ],
                         ],
diff --git a/tests/Feature/Submission/Tests/data/with_starttesttime.xml b/tests/Feature/Submission/Tests/data/with_starttesttime.xml
index 51abc90175..bde8efa15f 100644
--- a/tests/Feature/Submission/Tests/data/with_starttesttime.xml
+++ b/tests/Feature/Submission/Tests/data/with_starttesttime.xml
@@ -14,7 +14,7 @@
 			<Path>.</Path>
 			<FullName>./exec</FullName>
 			<FullCommandLine>testExec</FullCommandLine>
-			<StartTestTime>1771005834991</StartTestTime>
+			<StartTestTime>1771250190.659912</StartTestTime>
 			<Results>
 				<NamedMeasurement type="numeric/double" name="Execution Time">
 					<Value>0.00234227</Value>